alizarin carmine vs alizarin crimson

alizarin carmine and alizarin crimson both are nouns.

Word	Noun	Adjective	Verb	Adverb
alizarin carmine	Yes	No	No	No
alizarin crimson	Yes	No	No	No

As nouns, alizarin carmine and alizarin crimson are synonyms defined as:

alizarin carmine and alizarin crimson: any of various acid dyes; used for dyeing wool scarlet red

Other synonyms of alizarin carmine include alizarin red.

alizarin carmine (noun)	alizarin crimson (noun)
any of various acid dyes; used for dyeing wool scarlet red	any of various acid dyes; used for dyeing wool scarlet red